|Zeiss Loxia 50mm - Gardens Point, Brisbane, Queensland [click to enlarge]|
It's not really fair for me to comment on the performance of the latest version of Lightroom CC, as I don't have a graphics card that Lightroom will recognise for doing some of its work.
This means that for me, the performance has dropped. It hasn't gone off a cliff, but the handwriting is on the wall for a computer upgrade. (I'll stretch it out as long as I can.)
In order to pick a little time, I've taken to using a tactic from the blog of Julieanne Kost (an Adobe Principal Evangelist for Photoshop and Lightroom). Kost imports her images in the proprietary RAW format for her camera, does her cull of her shots, and only then converts to DNG (Digital Negative - Adobe's RAW format). Previously I'd been converting to DNG on import.
Kost's blog has wealth of techniques and videos about Lightroom and Photoshop.